esp-idf/components/esp_timer/Kconfig

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menu "ESP Timer (High Resolution Timer)"
config ESP_TIMER_PROFILING
bool "Enable esp_timer profiling features"
default n
help
If enabled, esp_timer_dump will dump information such as number of times the timer was started,
number of times the timer has triggered, and the total time it took for the callback to run.
This option has some effect on timer performance and the amount of memory used for timer
storage, and should only be used for debugging/testing purposes.
config ESP_TIME_FUNCS_USE_RTC_TIMER # [refactor-todo] remove when timekeeping and persistence are separate
bool
config ESP_TIME_FUNCS_USE_ESP_TIMER # [refactor-todo] remove when timekeeping and persistence are separate
bool
config ESP_TIME_FUNCS_USE_NONE # [refactor-todo] remove when timekeeping and persistence are separate
bool
config ESP_TIMER_TASK_STACK_SIZE
int "High-resolution timer task stack size"
default 3584
range 2048 65536
help
Configure the stack size of "timer_task" task. This task is used
to dispatch callbacks of timers created using ets_timer and esp_timer
APIs. If you are seing stack overflow errors in timer task, increase
this value.
Note that this is not the same as FreeRTOS timer task. To configure
FreeRTOS timer task size, see "FreeRTOS timer task stack size" option
in "FreeRTOS".
config ESP_TIMER_INTERRUPT_LEVEL
int "Interrupt level"
default 1
range 1 3 if IDF_TARGET_ESP32
range 1 1 if !IDF_TARGET_ESP32
help
This sets the interrupt priority level for esp_timer ISR.
A higher value reduces interrupt latency by minimizing the timer processing delay.
config ESP_TIMER_SHOW_EXPERIMENTAL
bool "show esp_timer's experimental features"
help
This shows some hidden features of esp_timer.
Note that they may break other features, use them with care.
config ESP_TIMER_TASK_AFFINITY
hex
default 0x0 if ESP_TIMER_TASK_AFFINITY_CPU0
default 0x1 if ESP_TIMER_TASK_AFFINITY_CPU1
default FREERTOS_NO_AFFINITY if ESP_TIMER_TASK_AFFINITY_NO_AFFINITY
choice ESP_TIMER_TASK_AFFINITY
prompt "esp_timer task core affinity"
default ESP_TIMER_TASK_AFFINITY_CPU0
help
The default settings: timer TASK on CPU0 and timer ISR on CPU0.
Other settings may help in certain cases, but note that they may break
other features, use them with care.
- "CPU0": (default) esp_timer task is processed by CPU0.
- "CPU1": esp_timer task is processed by CPU1.
- "No affinity": esp_timer task can be processed by any CPU.
config ESP_TIMER_TASK_AFFINITY_CPU0
bool "CPU0"
config ESP_TIMER_TASK_AFFINITY_CPU1
bool "CPU1"
depends on !FREERTOS_UNICORE && ESP_TIMER_SHOW_EXPERIMENTAL
config ESP_TIMER_TASK_AFFINITY_NO_AFFINITY
bool "No affinity"
depends on !FREERTOS_UNICORE && ESP_TIMER_SHOW_EXPERIMENTAL
endchoice
choice ESP_TIMER_ISR_AFFINITY
prompt "timer interrupt core affinity"
default ESP_TIMER_ISR_AFFINITY_CPU0
help
The default settings: timer TASK on CPU0 and timer ISR on CPU0.
Other settings may help in certain cases, but note that they may break
other features, use them with care.
- "CPU0": (default) timer interrupt is processed by CPU0.
- "CPU1": timer interrupt is processed by CPU1.
- "No affinity": timer interrupt can be processed by any CPU. It helps
to reduce latency but there is a disadvantage it leads to the timer ISR
running on every core. It increases the CPU time usage for timer ISRs
by N on an N-core system.
config ESP_TIMER_ISR_AFFINITY_CPU0
bool "CPU0"
config ESP_TIMER_ISR_AFFINITY_CPU1
bool "CPU1"
depends on !FREERTOS_UNICORE && ESP_TIMER_SHOW_EXPERIMENTAL
config ESP_TIMER_ISR_AFFINITY_NO_AFFINITY
bool "No affinity"
depends on !FREERTOS_UNICORE && ESP_TIMER_SHOW_EXPERIMENTAL
endchoice
config ESP_TIMER_SUPPORTS_ISR_DISPATCH_METHOD
bool "Support ISR dispatch method"
default n
help
Allows using ESP_TIMER_ISR dispatch method (ESP_TIMER_TASK dispatch method is also avalible).
- ESP_TIMER_TASK - Timer callbacks are dispatched from a high-priority esp_timer task.
- ESP_TIMER_ISR - Timer callbacks are dispatched directly from the timer interrupt handler.
The ISR dispatch can be used, in some cases, when a callback is very simple
or need a lower-latency.
config ESP_TIMER_IMPL_TG0_LAC
bool
default y
depends on IDF_TARGET_ESP32
config ESP_TIMER_IMPL_SYSTIMER
bool
default y
depends on !IDF_TARGET_ESP32
endmenu # esp_timer